diff --git a/include/linux/openvswitch.h b/include/linux/openvswitch.h
index eb1efa5..d42e174 100644
--- a/include/linux/openvswitch.h
+++ b/include/linux/openvswitch.h
@@ -243,6 +243,7 @@
 	OVS_KEY_ATTR_ICMPV6,    /* struct ovs_key_icmpv6 */
 	OVS_KEY_ATTR_ARP,       /* struct ovs_key_arp */
 	OVS_KEY_ATTR_ND,        /* struct ovs_key_nd */
+	OVS_KEY_ATTR_SKB_MARK,  /* u32 skb mark */
 	__OVS_KEY_ATTR_MAX
 };